It is the hottest summer in human history and, in a few short months, all water on earth will evaporate. So, twenty-something Charlie has gleefully taken to her couch for a final staycation. Her mother, roommate and sometimes-boyfriend all attempt to persuade her to leave her apartment and enjoy what's left of her life. But as Charlie’‘s memories take over, more complicated reasons for her self-inflicted hibernation emerge as she confronts her deferred dreams and considers the possibility of life and love just outside her door.